Create temporary function

[Steve Crawford <scrawford@xxxxxxxxxxxxxxxxxxxx>]

I have recently run across situations that might benefit from the 
ability to create a temporary function.

One situation is where periodic processing would benefit from 
server-side functions but the processing is run rarely (say monthly or 
annually) and the requirements for the function may change. This is 
relatively easily handled by a CREATE OR REPLACE..run..DROP FUNCTION but 
CREATE TEMPORARY FUNCTION would be cleaner.

The other is where it would be nice for a client to see an isolated 
individual copy of a function.

For me both of the above are minor nice-to-haves. I have no idea how 
difficult this would be to implement but in the spirit of brainstorming, 
I thought I'd throw it out to see if anyone else thinks it is a useful 
concept.

Cheers,
Steve